Gear casing



Sept. 25, 1928. 1,685,202

- A. F PITKIN ET AL GEAR CASING Filed Oct. 4, 1924 2 Sheets-Sheet 2INVENTORS A'ILTORN Y Patented Sept. 25; 1928.

came" stares ARTHUR F. ritrkiiv AND RALPH .9. 15A roR'TE, F SQHENECTADY,meson.

GEAR casino.

Application filed ()ctober 4, 924v Serial m. 741,551. T

Fig. 1 is a partial side view of an electric locomotive equipped with agear casing em bodying our invention; Fig. 2 is a transverse verticalsection thereof showing our vimproved gear casings on both sides of thelocomotive; Fig. 8 is a detail section showing the means for attachingthe two sections of the casing together; Fig.4 is a detail of a spacingwasher; Figs. 5 and 6 are, respectively, per- 1 spcctives of the maininner and outer portions of the casing; and Fig.7 is a .perspec tive ofthe capor upper half ofthe covering for the motor pinion.

'Our invention relates to the gear wheel casings intended to contain apair of gear wheels, and has tor its object the production ota gear casesubstantially oil tighnhf lOW' cost minimum weight, and which may beeasily handled during removal or replace 'iment. To this end we haveconstructed a gear ,case mainly'of sheet metal so related that the gearsand shaftingmay be taken down without' requiring the removal of both ofthe main sections of the casing from its support. Our invention alsocomprises the various features which We shall hereinafter describe andclaim.

'7 Referring to the drawings, the numeral -l,

indicates the motor shaft to the ends of which 39 motor. pinions' 2 areaflixed. Meshing with the pinions2 arethe gear wheels 3 mounted on theends of the jack shafts 4. Power from the motor 1 is transmitted to thedriving wheels through the crank pins 5 on the gears D 3 and thecoupling rods 5".

comprises the inner plate 6, the outer cover '7 and the pinion cap 8.The plate6 is, pre-f moval of the ack shaft. This opening when the caseis in use is closed by a plate 6 in order to make the casing dust proofand oil tight. The upper portion of the plate 6 has a semicircularrecess 6 for the motor shaft '1 The plate 6 is attached to the motorframe by at: 6* oiare plate and are threaded into the The'casing aboutthepinio'n Q'and gear-3' meansot bolts 9 which'seat inthe bolthol es'frame 15. The plateG is maintained in pro rr ce;

erly spaced relation to the frame 15 byineans of the washers 10,preferably ,made of two pieces-bolted together topermit their readyapplicationupon or removal from the bolts Upon either side ofthe'closu're plate 6*, and substantiallyaat right angles to the: plate6*, are flanges 6 which form a supporting hearing 'ior'the outer casing7 and also serve to position it accurately. u The outer casing 7 is ofdish shape and has Hilts upper portion atSl DhClI'CulaI recess 7 for themotor pinionQ. The upper edges 7 b or" the recess '7 are flanged toprovide a bolting bearingfor the pinion cap 8 A'grooved half ring 7 isriveted at the-outer side of the recess"? for reception of a closingplate 11 which with the outer wall ofthe cap 8 forms a completeclosurearound the outer end of V the motor "shaftl. To make the closure oil anddust tight, a feltring 12 secured by a washer 13' may be placed over theouter end of the shaft 1'. The central portion of the C I outercasing 7is cut out at 7 to make a running fit against'the driven gear collar 3'and forms 3 dust and oil proof jointat this'surface- 7 Secured about theinner edge 7 of the .in g 7 is the'reintorcing ring 7 the outer'edgeo'l' which forms an undercut shoulder for the hook bolts 14 mounted neartheperiphery of the plate 6- in the holesfi The pinion c ap.8 has aflange 8 shaped to bear against the endxoft-h'e motorjbea-ring' 1'6 andis secured thereto by a .stud passing through the lug 8 The cap Bis alsoattached to the flanges 7P3of the casing? by bolts extending through itsflanges 8. An opening, 8 is provl'd'ed-iii'th'e top of the pinion cover8 to permit ready inspectionoij the pinion and afford a place to applyalubricant:

1th a gear casing embodying our invendiflFicult-y. To effect this thepinion cap 8 is first taken off and then the bolts 14 areloos ened so asto remove the router casing-,7. N ext the bolts 9 are taken out, thewashers 10 disengaged therefrom and the inner bottom plate 6 removed. Asthe plate 6 is then resting on its shoulder -'6?,'it is next tilted attion the jack shaft 4 may be 'removed'without its bottom toward theframe 15 until theedge of the recess 6 clears the lower circumterenaledge of the gear collar '3, and then, when 7 the jack shaft has beenwithdrawn along i, q

aisis to clear frame the o and shaft 4 may be dropped straight downwardleaving the inner p1ate'6 suspended from its shoulders 6".

i 7 It will therefore be seen thatthe operation of removing or replacinga jack shaft or gear is extremely simple with gear cases ernbody.

ing our invention, and that because of the simplicity of our improvedconstruction it may be made at low cost and forms as well an extremelyeffective and reliable protection to gears.

The terms andexpressions which we have employed areused as terms ofdescription and not of limitation, and we have no intention, in the useof such terms and expressions, of excluding any mechanical equivalentsof V the features shown and described, or portions thereof, butrecognize that various structural modifications are possible within thescope of the invention claimed. What we claim is:

g 1. A gear casing comprising an inner and an outer part enclosingbetween them a driven a shaft; a gear wheel mounted thereon, having oneach side a projecting concentric collar and a housing, enclosing thegear wheel, comrising two members, one member constituting a coverprovided with a circular open ing, the edges of which make asubstantially oil proof fit with one of the collars ofthe gear, wheel,said member comprising a portion're- 4o movable to provide an openingthrough which theshaft may be withdrawn cross-axially of the member, theother member having a circular o en-ing, the ed es of which make a substantia ly, oil proof ht with theother collar of the gear wheel, saidlast mentioned member having a portion overlying the rim of the gearwheel, and making a substantiallyoil proof joint with the cover memben I3. In a railroad-vehicle, the combination of a shaft;:a gear wheelmounted thereon, havwheel, the other member having a circularopening,.the edges of which make a substantially oil'proof fit with theothercollar of the gear wheel.-said last mentioned member hav ing aportion overlying therim of the gear wheel, and making a substantialloil proof joint with the cover member; one OI the members having aportion removable to provide an opening through which theshaftmay bewithdrawn cross axially of the member.

4. In a railroad vehicle,fthe combination of a shaft; a gear wheelmounted thereon, havingon each side a projecting concentric collar, avehicle frame; and a housing, en closing the gear wheel, comprising twomembers, one member constituting aicover provided with a circular.opening,the edges of which make a substantially oil proof fit with oneof the collars ofthefgear wheel, the other member having a circularopening, the edges of which make a substantially oil proof fit with theother collar ofthe gear wheel, said last mentioned member; having aportion-- tioned member having means adapted to hook ,on to the vehicleframe to support the member during withdrawal of the gear and shaft.

5. In a railroad vehicle, the combination of a shaft; a gear wheelmounted thereon; and a casing, for containing oil, enclosing the gearwheel, and comprising two members enclosing opposite sides of the gearwheel, and encircling the shaft; one of the members having a bottomportion removable toprovlde a space Y through WhlCll the shaft may bemoved cross axially out of the member.

ARTHUR F. PITKIN. RALPH RL roars.

